Spy sweeper

I have just run a free spysweeper scan by WEBROOT.It listed 1 trojan Called "rasdialer", 12 adwares and a number of cookies. The question is What is the trojan and how to get rid. I Have installed Norton AV, Adaware 6, spybot S&D,all up to date, are these adequate if used regularly, as none have picked up this trojan.regards